There is one God and one Christ, and one Church, and one chair founded on Peter by the word of the Lord. It is not possible to set up another altar or for there to be another priesthood besides that one altar and that one priesthood. Whoever has gathered elsewhere is scattering.

Peter, in showing that the Church is one and that only those who are in the Church can be saved, said: "In the Ark of Noah certain persons, numbering only eight, were saved by water, which Baptism effects in like manner for you" (1 Peter 3:20). He proves and demonstrates that the solitary Ark of Noah was the figure of the One Church. If, at the time of this Baptism of the world anyone could have been saved without having been in the Ark of Noah, then he who is outside the Church could now be brought to life by Baptism.

If a murder is committed privately it is considered a crime. But if it happens with the authority of the state, they call it courage.

Let us, then, who in Baptism have both died and been buried in respect to the carnal sins of the old man, who have risen again with Christ in the heavenly regeneration, both think upon and do the things that are Christ's.

Knowing that there is one Baptism, we who hold the head and root of the One Church know for certain that to him who is outside the Church nothing is lawful.

"If any man thirst, let him come and drink from the rivers of living water" (cf. John 7:38). Where shall he who thirsts come? To heretics where the fountain and river of water is in no way life-giving? Or to the Church, which is One?

Baptism pertains to the Church alone.